| Patents for C01B 21 - Nitrogen; Compounds thereof (10,781) |
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| 05/24/1989 | EP0316665A1 Selective adsorption of CO2 on zeolites |
| 05/23/1989 | US4833293 Plasma nitrogen fixation with short path heat transfer |
| 05/23/1989 | US4833107 Electrical and thermal conductivity |
| 05/23/1989 | US4832931 Reaction of nitrogen trifluoride with silicon |
| 05/23/1989 | US4832718 Processing nitrogen-rich, hydrogen-rich, and olefin-rich gases with physical solvents |
| 05/18/1989 | WO1989004444A1 Process for liquefying, concentrating and purifying nitrogen trifluoride |
| 05/18/1989 | WO1989003242A3 Process for the reduction of nitrogen oxides in an effluent |
| 05/17/1989 | EP0315953A2 Stable methylpolydisilylazane polymers |
| 05/16/1989 | CA1254126A1 Integrated gas separation process |
| 05/10/1989 | EP0315309A1 Method and apparatus for producing a controlled atmosphere |
| 05/05/1989 | WO1989003810A1 Sinterable nitrides |
| 05/03/1989 | EP0313980A1 Process and apparatus for the preparation of ceramic powders |
| 05/03/1989 | EP0313648A1 Process for nitrogen oxides reduction and minimization of the production of other pollutants. |
| 05/02/1989 | US4826666 Method of preparing metal carbides and the like and precursors used in such method |
| 04/26/1989 | EP0313443A1 Process for the preparation of aluminium oxynitride and its use in the production of infra-red windows |
| 04/26/1989 | EP0312743A2 An integrated pressure swing adsorption/membrane separation |
| 04/26/1989 | CN1032548A Process for the reduction of nitrogen oxides in an effluent |
| 04/25/1989 | US4824648 Polyphosphonitriles from n/dichlorophos-phoryl/trichloro-phosphazene |
| 04/25/1989 | CA1252979A1 Continuous process for purifying crude linear polydichlorophosphazene polymer |
| 04/20/1989 | WO1989003366A1 Vanadium/tungsten catalyst and process |
| 04/20/1989 | WO1989003242A2 Process for the reduction of nitrogen oxides in an effluent |
| 04/19/1989 | EP0312392A1 Thermoluminescent material |
| 04/12/1989 | EP0311345A1 Carbothermally reduced ceramic materials and method of making same |
| 04/12/1989 | CN1032324A Method of purificating nitrogen for refining aluminium fusant |
| 04/11/1989 | US4820783 Polymerizing, pyrolyis of polysilanes and polysilylamides |
| 04/11/1989 | CA1252475A1 Cationically catalyzed process for the treatment of a polysilazane containing, on the average, at least two =sih groups per molecule |
| 04/06/1989 | WO1989003009A1 Processing nitrogen-rich, hydrogen-rich, and olefin-rich gases with physical solvents |
| 04/06/1989 | DE3731988A1 Reactor for treating a gas by a catalyst having a large inlet surface area |
| 04/04/1989 | US4818611 High-purity silicon nitride fibers |
| 04/04/1989 | US4818511 Process and apparatus for producing non-oxide compounds |
| 04/04/1989 | US4818494 Apparatus for manufacturing nitrogen fertilizer solutions |
| 04/04/1989 | US4818254 Semi-permeable membranes consisting predominantly of polycarbonates derived from tetrahalobisphenols |
| 04/04/1989 | US4817391 Method and apparatus for producing a controlled atmosphere |
| 03/29/1989 | EP0308719A1 Method for production of hydroxylammonium salt |
| 03/29/1989 | EP0308409A1 Process for producing carbon molecular sieves. |
| 03/28/1989 | US4816497 Infusible preceramic silazane polymers via ultraviolet irradiation |
| 03/28/1989 | US4816041 Process and installation for the adsorptive separation of krypton from a krypton nitrogen gas mixture |
| 03/23/1989 | DE3831423A1 Verfahren zur herstellung von hochreinem siliciumnitrid durch die direkte reaktion zwischen elementarem silicium und fluessigen stickstoff-wasserstoff-reaktionsmitteln A process for the production of high purity silicon by the direct reaction between elemental silicon and liquid nitrogen-hydrogen reactants |
| 03/22/1989 | EP0308116A1 Making fine particulate aluminum nitride |
| 03/22/1989 | EP0307682A2 Process for producing transparent aluminium nitride foil or coatings from aluminium iodide ammine salts |
| 03/21/1989 | US4814156 Separation, absorption, combustion |
| 03/15/1989 | EP0307311A1 Process for the preparation of uranium and/or plutonium nitride for use as a nuclear reactor fuel |
| 03/14/1989 | US4812301 Production of titanium nitride, carbide, and carbonitride powders |
| 03/14/1989 | US4812300 Mixed metal oxides |
| 03/14/1989 | US4812298 Heating silicon nitride, silica and-or alumina, aluminum, aluminum nitride and-or silicon |
| 03/14/1989 | US4812297 Preparation of N-(dichlorophosphoryl)trichlorophosphazene |
| 03/14/1989 | US4812166 High frequency induction plasma |
| 03/14/1989 | CA1251011A1 Linear polychlorophosphazenes containing a dichlorothiophosphoryl end-group |
| 03/09/1989 | WO1989001911A1 Method for production of high purity aluminum nitrides |
| 03/08/1989 | EP0305985A1 Process for the production of ceramic fibres on the basis of boron nitride |
| 03/07/1989 | US4810480 Preparation of polychlorophosphazene |
| 03/07/1989 | US4810265 Pressure swing adsorption process for gas separation |
| 03/01/1989 | EP0304478A1 Process for nitrogen oxides reduction with minimization of the production of other pollutants. |
| 02/23/1989 | DE3726732A1 Processing for scrubbing NO and/or SO2 out of gas mixtures containing NO and/or SO2 |
| 02/23/1989 | DE3726730A1 Kohlenstoffmembranen und verfahren zu ihrer herstellung Carbon membranes and methods for their preparation |
| 02/21/1989 | US4806330 Reacting aluminum sulfide and ammonia to form intermediate; heating to form nitride |
| 02/21/1989 | US4806322 Process for the production of linear polyphosphazenes |
| 02/21/1989 | US4806319 Reduction of sulfur and nitrogen oxides using petroleum pitches |
| 02/15/1989 | CN1031064A Generation process and apparatus of inert gas |
| 02/14/1989 | US4804447 Fused salt electrolysis of electrolyte mixture of hydrofluoric acid salts of ammonia and hydrazine |
| 02/14/1989 | US4804442 Dehydration of aqueous solution with inorganic compound; low temperature vacuum distillation |
| 02/09/1989 | EP0266417A4 REDUCTION OF NO x? IN FLUE GAS. |
| 02/07/1989 | US4803291 Particulate compositions of ferromagnetic metal oxalates in the form of submicronic acicular particles, the preparation of same and application thereof |
| 02/07/1989 | US4803187 In liquid phase to alcohol |
| 02/01/1989 | EP0301824A2 Separation of gas mixtures |
| 02/01/1989 | EP0301723A1 Oxidation of alkanes |
| 02/01/1989 | EP0301529A1 Method for preparing aluminum nitride and its sinter |
| 01/31/1989 | US4801439 Catalytic process for making compounds having a non-Lewis acid/base bond between a group IIIA metal and group VA nonmetal |
| 01/31/1989 | CA1249418A1 Method of making oxynitrides |
| 01/25/1989 | EP0300227A2 Process for manufacturing nitrogen trifluoride |
| 01/25/1989 | CN1030534A Process for separating nitrogen from mixtures thereof with less polar substance |
| 01/24/1989 | US4800183 From melamine and metal compounds |
| 01/24/1989 | US4800182 Silicon nitride-silicon carbide composite material and process for production thereof |
| 01/24/1989 | CA1249229A1 Production of oxygen enriched air |
| 01/24/1989 | CA1249116A1 Methods and apparatus for purifying inert gas streams |
| 01/18/1989 | EP0299819A1 Process for the regulation of molecular weights of polychlorophosphazenes and polyorganophosphazenes derived therefrom, and the regulation agents used in the process |
| 01/18/1989 | EP0299212A2 A method of synthesizing amorphous group IIIA-group VA compounds |
| 01/17/1989 | US4798714 Purification with gaseous chlorine and oxygen |
| 01/17/1989 | US4798701 Method of synthesizing amorphous group IIIA-group VA compounds |
| 01/17/1989 | CA1248880A1 Molecular sieve type gas separation systems |
| 01/11/1989 | EP0298084A1 Method of forming a ceramic product |
| 01/11/1989 | CN1030215A Polycholorphosphazenes and regulative method of polyorganophosphazenes molecular weight derived from it as well as regulator in this method |
| 01/11/1989 | CN1030193A Process for nitrogen oxides reduction and minimization of production of other pollutants |
| 01/10/1989 | US4797377 Massive crystalline aluminosilicate with expanded structure and process for its manufacture |
| 01/10/1989 | US4797141 Method for obtaining CO2 and N2 from internal combustion engine or turbine generated gases |
| 01/10/1989 | CA1248323A1 Process for preparing linear polychlorophosphazenes containing pxc1.sub.2 end-group, x standing for o or s |
| 01/04/1989 | EP0297542A2 Process for separating nitrogen from mixtures thereof with less polar substances |
| 01/04/1989 | CN1030064A Process for n-(dichloro-phosphate-acyl)-tricholoro-phosphate-nitrile |
| 01/03/1989 | US4795622 Reacting a silicon halide with a base, treating the resulting adduct with ammonia; silicon nitride precursor |
| 01/03/1989 | US4795621 Process for the preparation of phosphonitrile chloride oligomer |
| 12/28/1988 | EP0296210A1 Method for producing ceramic powders. |
| 12/28/1988 | CN88103731A Process for production or recovery of acids from metalliferous solutions of such acid |
| 12/28/1988 | CN88103481A Copolymers containing si-n and si-si, polycarbosilazanes obtained from pyrolytic copolymers and utilization of polycarbosilazanes for preparation of carbonitride of silicium |
| 12/28/1988 | CA1247326A Process for production of silicon nitride |
| 12/21/1988 | EP0296147A1 Process for the recovery and/or regeneration of acids from metalliferous solutions of these acids |
| 12/21/1988 | EP0296028A2 Polymers with Si-N and Si-Si links, polycarbosilazanes obtained by pyrolysis of these copolymers, and use of the polycarbosilazanes for preparing carbides and nitrides of silicium |
| 12/21/1988 | CN88102048A Process for reducing nitrogen oxides in effluent using hydrocarbon or hydrogen peroxide |
| 12/20/1988 | US4792439 Process for decreasing the content of nitrogen oxides in flue gases |
| 12/15/1988 | DE3718370A1 Process and apparatus for the thermal treatment of catalysts |
| 12/14/1988 | EP0295062A2 Polysilacyclobutasilazanes |